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Tap water quality report

Greendale, WI

EPA monitoring detected 13 contaminants across the 1 water supplier serving Greendale. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
14,393
people served
13
contaminants found
Wisconsin rankings Lead in Wisconsin PFAS in Wisconsin

What was found in Greendale's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Copper
99.8 µg/L 7.7%
of the EPA limit 1300 µg/L
Main supplier: GREENDALE WATERWORKS · 14,393 people · 2017
1/1 SYR4
TTHM
15.8555 µg/L 20%
of the EPA limit 80 µg/L
Main supplier: GREENDALE WATERWORKS · 14,393 people · 2019
1/1 SYR4
Chloroform
6.84 µg/L
No EPA limit set
Main supplier: GREENDALE WATERWORKS · 14,393 people · 2019
1/1 SYR4
Bromodichloromethane
5.61 µg/L
No EPA limit set
Main supplier: GREENDALE WATERWORKS · 14,393 people · 2019
1/1 SYR4
Total Haloacetic Acids (HAA5)
5.512 µg/L 9.2%
of the EPA limit 60 µg/L
Main supplier: GREENDALE WATERWORKS · 14,393 people · 2019
1/1 SYR4
Dichloroacetic Acid
3.52 µg/L
No EPA limit set
Main supplier: GREENDALE WATERWORKS · 14,393 people · 2019
1/1 SYR4
Dibromochloromethane
3.3 µg/L
No EPA limit set
Main supplier: GREENDALE WATERWORKS · 14,393 people · 2019
1/1 SYR4
Lead
1.565 µg/L 10%
of the EPA limit 15 µg/L
Main supplier: GREENDALE WATERWORKS · 14,393 people · 2017
1/1 SYR4
Trichloroacetic Acid
1.445 µg/L
No EPA limit set
Main supplier: GREENDALE WATERWORKS · 14,393 people · 2019
1/1 SYR4
Dibromoacetic Acid
0.8300 µg/L
No EPA limit set
Main supplier: GREENDALE WATERWORKS · 14,393 people · 2019
1/1 SYR4
Bromoform
0.6640 µg/L
No EPA limit set
Main supplier: GREENDALE WATERWORKS · 14,393 people · 2019
1/1 SYR4
Monobromoacetic Acid
0.6060 µg/L
No EPA limit set
Main supplier: GREENDALE WATERWORKS · 14,393 people · 2019
1/1 SYR4
Lead
0.00032 mg/L 2.1%
of the EPA limit 0.0150 mg/L
Main supplier: GREENDALE WATERWORKS · 14,393 people · 2023
1/1 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Greendale

SupplierPopulation served
GREENDALE WATERWORKS 14,393

Frequently asked questions about Greendale tap water

Is Greendale tap water safe to drink?

EPA testing detected 13 contaminants in the water serving Greendale. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Greendale?

1 public water supplier report drinking-water monitoring for Greendale, Wisconsin to the EPA. Each is listed above with its population served.

What contaminants are in Greendale's water?

The contaminants EPA monitoring detected in Greendale include Copper, TTHM, Chloroform, Bromodichloromethane, Total Haloacetic Acids (HAA5). The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.